Is 0.15 bigger than 0.1

YES!!!

To compare decimals .

0.15 & 0.1

Bring both decimals to the same number of decimal places by inserting suffix 'zeroes'.

Hence

0.15 & 0.10

Drop the decimal point

015 & 010

Ignore the prefix zero'

15 & 10

It should be obvious that 15 > 10 .

Hene it followx that 0.15 > 0.1

This method is good to compare any decimals, however, big or small.